x <- c("abc","def","rst","xyz","age","age2")
grep("^age$", x)
[1] 5
grep("^age2$", x)
[1] 6
-----Oprindelig meddelelse-----
Fra: R-help [mailto:r-help-bounces at r-project.org] P? vegne af Steven Yen
Sendt: 4. maj 2016 07:46
Til: r-help
Emne: [R] Grep command
Dear all
In the grep command below, is there a way to identify only "age" and not "age2"? In other words, I like to greb "age" and "age2"
separately, one at a time. Thanks.
x<-c("abc","def","rst","xyz","age","age2")
x
[1] "abc" "def" "rst" "xyz" "age" "age2"
grep("age2",x)
[1] 6
grep("age",x) # I need to grab "age" only, not "age2"
[1] 5 6
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